code: def _get_chars():
      return (
          "_",
          "-",
          "!",
          "'",
          "(",
          ")",
          ",",
          ".",
          ":",
          ";",
          "?",
          " ",
          "a",
          "b",
          "c",
          "d",
          "e",
          "f",
          "g",
          "h",
          "i",
          "j",
          "k",
          "l",
          "m",
          "n",
          "o",
          "p",
          "q",
          "r",
          "s",
          "t",
          "u",
          "v",
          "w",
          "x",
          "y",
          "z",
      )
  
file_path: audio/src/torchaudio/pipelines/_tts/utils.py
imports: import logging
  import os
  import torch
  from torchaudio._internal import download_url_to_file, module_utils
label_desc: Use image node_id 1 for calling a global function with example usage: _get_chars() and returns: str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str